question abour temporal feature aggregation

[eliliu2233]

Thanks for your exciting work! I have two questions about the temporal feature aggregation:

1. Does the AFFM use deformable attention, or only use original attention?
2. Does the AFFM shared parameters? Suppose I have temporal BEV features at {T, T-1, T-2}, and I need 4 AFFM to finish the temporal aggregation as introduced in section3.2. Does these 4 AFFM shared parameters? Or I need to initiate 4 attention modules with different parameters?
   Looking forward to your reply.

[xiazhongyv]

1. We use the original cross attention.
2. All AFFMs of the forward process share parameters, and all AFFMs of the reverse process share parameters, so only two AFFM modules need to be instantiated.